Generic Blue Replacement Silicone Skin for Iphone 4, 4S OtterBox Defender,Compare to the original * Replacement Silicone Skin compatible and comparable to OtterBox Defender * Rugged protection and a 30 day warranty are included with any purchase with Authorization card from Mobile Supply and it's affiliates * A very cost effective replacement for your current model * Mobile Supply and it's and it's products are protected by US trademark laws. Warranty card and authentication number send with every purchase. If you did not receive a warranty card please return your item immediately. * 100% silicone skin that is thick and durable.